gun control is again front and center at the annual conference of mayors, joe biden lobbied for the white house's plan to prevent gun violence. he said the need is urgent and called for action. >> i know we don't have absolute unanimity in this ballroom nor do we in any ballroom, but we all know, everyone acknowledges we have to do something. we have to act. and i hope we're all agreeing there's a need to respond to the carnage on our streets and in our schools. >> president obama laid out a number of proposals and steps he's has taken on gun control. few republicans are outright hostile to his plans with one texas congressman threatening executive impeachment. the nra has denounced the proposals, but they're taking heat over an ad they launched about president obama's daughters and the security they have at their school. the white house called the repugnant and cowardly. that's for you to decide. they blasted the nra. here's what he said. >> to talk about the president's children or any public officer's children who have not by their own choice but by requirement to have protection, and